The twenty-first century is likely to sustain more transformational, innovative and challenging trends than any other century in the past. In this context, India is bound to visualise a relatively wider and more comprehensive vision of national security in the foreseeable future. As an important growing player in world politics, India's internal and external security challenges are an important matter to study. This book covers various aspects of India's internal and external security challenges. It is a compilation of scholarly works focusing on different strategic issues of India's concern which include maritime security, Naxal issues, insurgency problem, geo-economics, ethnic conflict, climate change, cyber security and so on.